1, dual trace oscilloscope is a device that converts voltage signals into visible light signals and projects them on the display screen. Dual-trace oscilloscope has two input terminals, which can simultaneously access two voltage signals for display.

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2. In the oscilloscope, after the input signal is amplified, the electronic switch is used to switch the two input signals to the deflection plate of the oscilloscope in turn, so that the two signals are displayed on the screen of the oscilloscope at the same time, which is convenient for observation and comparison of the two signals.

3. The basic structure of dual trace oscilloscope is as follows:

Dual-trace oscilloscope is mainly composed of oscilloscope tube, amplifier, scanning and trigger system and power supply. Among them, the display device of oscilloscope in display system is cathode ray tube, abbreviated as CRT. The basis of cathode ray tube is a system that can generate electrons, called electron gun.

The electron gun emits electrons to the screen. The electrons emitted by the electron gun are focused to form an electron beam and hit a point in the center of the screen. The inner surface of the screen is coated with a fluorescent substance so that the spot hit by the electron beam emits light.

5. The working principle of double trace oscilloscope is as follows:

The electron gun emits electrons after being heated by the filament. The focusing electrode focuses the electrons emitted by the electron gun into a very thin electron beam, which can make the waveform display clear. Applying a higher positive voltage to the accelerating electrode to attract electrons away from the electron gun at high speed; A high positive voltage is applied to the display screen to attract electrons to impact the display screen, so that the fluorescent material coated on the display screen emits light.

A deflection voltage is applied to the vertical deflection plate and the horizontal deflection plate, and the polarity and amplitude of the deflection voltage control the position where the electron beam hits the display screen. When the deflection voltage changes with the input signal, the electron beam can "draw" the signal waveform on the screen.

6. Dual-trace oscilloscope has two input terminals, which can obtain two voltage signals for display at the same time. Inside the oscilloscope, after the input signal is amplified, the electronic switch is used to switch the two input signals to the deflection plate of the oscilloscope in turn, so that the two signals are displayed on the screen of the oscilloscope at the same time, which is convenient for observation and comparison of the two signals.